Arc-lamp.



G. a. STEVENS.

ABC LAMP.

APPLICATION FILED SEPT. 27, 1906.

900,793. I Patented 001;. 13, 1908.

Witnesses: Inventor:

% George 1.5tevens;

I No. 900393.

To' all whom it may concern:

Y the lamp and the lamp may conveniently be hung from the yoke thereof. For example,

v the lower end of the legs of the back-bone chusetts, have invented certain new and usethe fol owing is a specification.

v To the above end my invention consists in certain novel features of construction and hood does not have to bear-the weight of the entire lamp, as 1s usually'the case, it. may be oetweenthe hood and the back-bone. v The members 4 and 5 may also be formed of UNITED 'STATESPATENTOFFICE? GEORGE E. STEVEN-S, OF LYNuMA's sAoHUsnrTs, ASSIGNOR To GENERAL ELEo'rR 'o 1OOMPANY A CORPORATI ON OF NEW YORK Alto-LAMP.

Be it known that I, GEORGE E. S'rnv N s, a citizen of the United .States, residing at Lynn, in the county of Essex, State of Massaful Im rovements in Arc-Lamps, ofwhich' My invention re ates to electric arc the construction of the same.

arrangement of parts tobe' hereinafter particularly pointed out in the claims.- v For a full understanding of my invention, however, and of its objects andadvantages, reference, may beihad-to the following detailed description taken in connection with the accompanying drawing, wherein Figure -1 shows, partly in side elevation which Fig.1 is taken. I Y

Referring to the drawing-,1 represents 'an' elongated lJ-sha ed member whichis prefer ablyformed by ending into shape arod of iron or other metal having any suitable or. desired cross-section; This Y U-shaped meln her forms the main support or backbone of a husl'iing of insulatingflmaterial 2 may be slipped into the closed endof the backbone before the remaining parts of the lampframe are assembled on this member and the lamp v maybe-supp ortedby some means engaging with or passing through this bushing. U hr) the bee bone are assembled a hood mm er 3 andtwo platforms Agand 5 Si'nce'the made of thin sheet meta-l, asshown, having openings ,6 and 7 punched therein for receiving the two legs of i the back-bone. The metal which is removed from the hood to iereby long bearing surfaces are obtained sheet metal, the member 5 being secured to Sp ecification of Letters Patent. Application fll'ed September 2v,-1aos. Serial No. 336,383.

lamps r and has for its object to simplify and cheapen orm the openings 6 and 7 is preferably struck up into the form of flanges 8 and),

Patented- Oct; 1-3,- loos.

usual'constructlon. I v

11 is the holder for the'u'pper electrode;

this holder beingprovided with a cross-head:

' 12' which engages and slides between the legs of the back-bone. The rod 13 which su 3 ports the lower electrode may convenient pass through the gas-cap and be" secured to the 'platfor1n4 in the usual manner, extending, however, beyond this latter platform into (proximity to-the hood, where it is se-i' cure its-end embedded in a block of insulation 14 surrounding one of the lamp terminals 15.

The regulating magnet-1'6, for operating the" clutch 17 to feed the upper'electrode, may

and serving to support a gas-cap; of; any

in any 'su'itable'manner, as by having be su ported from thehood and. have asso ciate therewith a dash-pot 18, the fixed coil 20 may be'support'ed partly from. the ho'odand partly from the rod 13, as shown. The lamp casing 21 is suspended from the hood, as by means of screws 22- engaging member of which, '19, is secured tolthepl'at- 'form t in the'usual manner. The resistance slots in the casing. The globe 23 may in turn be supported from the lower endol't the casing in any suitablelway.

It will be seen that by building up the frame of the lamp upon a back-bone of the I character disclosed, a light and compact lamp is secured and one which is much cheaper than lamps as heretofore constructed, without loss of strength or stiffness.

" Although Ihave shown and described only I the best form of my invention now known to me, I do not desireto be limited to-this parbone made ofa rod bent into the for1n of a" yoke having depending legs,;asheet .metal .90 ticular form, since in its broader aspects my embodied'm various other hood having] holes through Which'said legs I pass, and one or more platforms carried upon said legs. I

2. An arc lamp framefiomposed of'a backbone made ofza rod bent-into the form of a yoke having dependinglegs, -a sheet metal hood having holes-through which said legs -pass, and aplatfornreonnected the. lower" ends of said legs.

3. In an arc lamp, a backbone consisting hf a rod bent into the form of a yoke having ji hood mounted on said backbone intermediate two depending le s, a platform secured to the lower ends of t e said legs, and a hood niounted on the backbone intermediate the 5 ends thereof.

4. In an arc lamp, a backbone comprising a yoke and a pair of legs depending from said yoke, a hood-mounted on the backbone in termediate the ends thereof, a platform [Ii-mounted on said legs, acrosshead located tebove said platform and arranged to slide tween said legs, and an electrode carried by} 'said c'rosshead and extending through said platform.

5. In an arc lamp, a backbone consisting of a piece of metal bent into the form of a yoke having depending legs, a hood having open ings through which said legs pass, a platforn'i secured to said legs, electrodes, one of said electrodes being arranged between said legs and extending through said platform, and a crosshead slidingly mounted on said legs and carrying said latterelectrode.

6. In an arc lamp, a backbone composed of 25 a yoke member having depending legs, a

the ends thereof, a platform mounted on the lower ends of said legs, a crosshead located above said platform and arranged to slide between said legs, an electrode carried by said crosshead and projecting through said platform, a rod connecting said hood and said platform and extending to a point he neath said. platform, and a second electrode supported on the lower end of said rod.

7 In an arc lamp, the combination of an inverted U-shaped backbone the upper end of which forms an eye or hanger for the lamp, a hood supported on the backbone, and an insulated eyebushing 'littcdinto the yoke and held in position by the hood, substantially as described.

In witness whereof, l. have hereunto set my hand this twenty iifth day of September, 1906.

GEORGE E. SIEYENS.

\Vitnesses JOHN A. McMLiNUs, Jr., HENRY O. W-ns'rnNnom'. 

